definition of
e

[1] #1 e n. [vitamin E, tocopherol, E] a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body. wn

[2] #2 e n. [einsteinium, Es, E, atomic number 99] a radioactive transuranic element produced by bombarding plutonium with neutrons. wn

[3] #3 e n. [east, due east, eastward, E] the cardinal compass point that is at 90 degrees. wn

[4] #4 e n. the base of the natural system of logarithms; approximately equal to 2.718282.... wn

[5] #5 e n. [E] the 5th letter of the Roman alphabet. wn